Grounding device for a local gas extractor, a local gas extractor with such a grounding device and a method for mounting such a grounding device
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Solution Overview
Problem
Existing grounding devices for local gas extractors in clean ATEX environments are cumbersome, complex, and not optimized for cleanliness, safety, and cost-efficiency, particularly in explosive atmospheres where static electricity diversion is critical.
Innovation Solution
A grounding device with a conductive body featuring a head section to interact with the metal wire of the tubing and a connection section that abuts the duct and coupling element, providing a simple and reliable electrical connection without external fasteners, facilitating easy installation and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hose clamps with grounding cables and multiple components (screws, holes) are used to divert static electricity, then electrostatic discharge is diverted to earth connection, but cleanliness is compromised and device complexity increases
Solution Approach 1:
The patent merges multiple separate components (hose clamp, grounding cable, screws, holes) into a single integrated grounding device. The conductive body combines the clamping function and grounding function in one piece, eliminating the need for separate grounding cables and fasteners. This reduces device complexity while maintaining the reliability of electrostatic discharge diversion.
Solution Approach 2:
The grounding device performs multiple functions simultaneously: it mechanically secures the flexible conduit to the duct (clamping function) and provides electrical grounding (conductive function). The single device replaces multiple specialized components, achieving both mechanical and electrical objectives without requiring separate assemblies.
2Reliability
If hose clamps with grounding cables and multiple components are used, then electrostatic discharge is diverted, but ease of installation and maintenance deteriorates
Solution Approach 1:
By combining the clamping and grounding functions into one integrated device, installation is simplified to a single mounting operation rather than coordinating multiple components. Maintenance becomes easier as there are fewer parts to inspect, tighten, or replace. The single-device approach directly improves ease of operation while preserving electrostatic discharge diversion capability.
3Reliability
If multiple components including screws and holes are used for grounding, then electrostatic discharge is diverted, but cleanliness in clean environments deteriorates
Solution Approach 1:
The integration of all grounding components into a single sealed device eliminates exposed screws, holes, and cable connections that can accumulate dust and contaminants. The unified structure has fewer crevices and surfaces where debris can collect, thereby improving cleanliness in clean environments while maintaining electrostatic discharge diversion functionality.
4Ease of manufacture
If a simple grounding device with single conductive body is used, then ease of manufacture and cost-efficiency improve, but reliability of electrical connection may deteriorate
Solution Approach 1:
The grounding device utilizes composite construction combining conductive materials (for electrical connection) with mechanically robust materials (for clamping). This composite approach ensures both manufacturing simplicity and reliable electrical connection by selecting materials that inherently provide both properties without requiring complex assembly or additional components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively diverts static electricity, reducing the risk of electrostatic discharge and shocks in ATEX environments, while being easy to install, manufacture, and maintain, ensuring safety and cost-effectiveness.
Implementation Method 1
The grounding device is configured to interconnect a tubing, a conductive duct and a coupling element of the local gas extractor to divert static electricity
Data Source
AI summary
A grounding device for a local gas extractor, a local gas extractor arrangement including such a grounding device, and a method for mounting such a grounding device. The grounding device is configured to interconnect a tubing, a conductive duct and a coupling element of the local gas extractor to divert static electricity. The tubing includes a metal wire, wherein the grounding device includes a conductive body with: a head section configured to interact with a part of the metal wire of the tubing; and a connection section configured to be arranged on the tubing in abutment with the duct and the coupling element.